Advice for GMing FFd20

[theholymoo]

So I'm setting up a campaign using this FFd20 system and the only thing that is lacking i would say is monsters, and i think this is a known issue, so do you have any advice on creating new monsters, mainly in regards to blue mages and new monster abilities/spells, is their perhaps a system that was created to make the blue magic spells or was it just kinda winged by comparing it to other magics?